Weco Discovery 200 AC/DC User manual

Cod.006.0001.1340
20/02/2014 v2.11
ENGLISH
WECO srl
Via S. Antonio, 22 - BELVEDERE
36050 TEZZE SUL BRENTA (VICENZA) ITALY
Tel.[phone] - Fax [phone]
www.weco.it - E-mail [email protected]
Discovery 200 AC/DC
GB
Instruction manual

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CONTENTS
1INTRODUCTION ............................................................................................................................................... 4
2INSTALLATION ................................................................................................................................................ 5
2.1 CONNECTIONS TO THE ELECTRICAL MAINS NETWORK ........................................................................... 5
2.2 FRONT PANEL.................................................................................................................................................. 5
2.3 REAR PANEL.................................................................................................................................................... 5
2.4 PREPARING FOR MMA WELDING.................................................................................................................. 6
2.5 PREPARING FOR TIG WELDING .................................................................................................................... 8
3COMMISSIONING........................................................................................................................................... 10
3.1 USER INTERFACE ......................................................................................................................................... 10
3.2 UNIT POWER-UP............................................................................................................................................ 12
3.3 RESET (LOAD FACTORY SETTINGS) .......................................................................................................... 12
3.4 TORCH LOADING........................................................................................................................................... 12
3.5 ALARMS MANAGEMENT ............................................................................................................................... 12
4WELDING SETTINGS..................................................................................................................................... 13
4.1 TORCH TRIGGER MODES ............................................................................................................................ 13
4.2 SELECTION OF THE WELDING MODE AND TORCH TRIGGER PROCEDURE......................................... 14
4.3 WELDING PARAMETERS .............................................................................................................................. 15
4.4 PARAMETERS ACTIVATION ......................................................................................................................... 17
4.5 PARAMETERS SETTING: (1ST LEVEL) ........................................................................................................ 18
4.6 PARAMETERS SETTING: (2ND LEVEL)........................................................................................................ 18
5TECHNICAL DATA......................................................................................................................................... 19
6SPARE PARTS ............................................................................................................................................... 20
7ELECTRICAL DIAGRAM................................................................................................................................ 22
7.1 TORCH CONNECTOR.................................................................................................................................... 23
7.2 REMOTE CONTROLLER CONNECTOR........................................................................................................ 23

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1INTRODUCTION
IMPORTANT!
This handbook must be consigned to the user prior to
installation and commissioning of the unit.
Read the "General prescriptions for use" handbook supplied
separately from this handbook before installing and
commissioning the unit.
The meaning of the symbols in this manual and the associated
precautionary information are given in the "General
prescriptions for use”.
If the "General prescriptions for use" are not present, it is
mandatory to request a replacement copy from the
manufacturer or from your dealer.
Retain these documents for future consultation.
KEY
DANGER!
This pictogram warns of danger of death or serious injury.
WARNING!
This pictogram warns of a risk of injury or damage to property.
CAUTION!
This pictogram warns of a potentially hazardous situation.
INFORMATION
This pictogram gives important information concerning the execution
of the relevant operations.
This symbol identifies an action that occurs automatically as a
result of a previous action.
This symbol identifies additional information or a reference to a
different section of the manual containing the associated
information.
§
This symbol identifies a reference to a chapter of the manual.
*1
The symbol refers to the associated numbered note.
NOTES
The figures in this manual are purely guideline and the images may
contain differences with respect to the actual equipment to which they
refer.
INTRODUCTION
Discovery 200 AC/DC is an advanced technology single-phase
welding power source for AC and DC TIG welding operations.
AC TIG functions are ideal for aluminum, magnesium and related
alloys welding.
AC TIG welding is optimized thanks to:
Synergic arc ignition selection located on the front panel, it modifies
the ignition according to electrode diameter.
Advanced Soft AC-Square Waveform for outstanding welding quality
through faster welding speed, better pool control and noise reduction.
Mild steel, stainless steel and copper can be easily welded in DC TIG.
Slow Pulse (0.1Hz-5.0 Hz) and Fast Pulse (5.0 Hz-250 Hz) are
available in TIG DC.
Special HF control provides100 % rapid and precise arc ignition.
Up to 3,25 mm diameter electrode welding is possible in MMA.
Accessories that can be connected to the unit:
-Overcut device to protect the power source from power supply
voltage spikes that could damage the electrical components.
-Manual remote controller for remote adjustment of the welding
current.
-Foot-pedal remote controller for TIG torch arc striking and remote
adjustment of welding current.
-Liquid cooler for TIG torches.
-Power source trolley.
Consult your dealer for an updated list of accessories and the latest
available new products.

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2INSTALLATION
DANGER!
Lifting and positioning
Read the warnings highlighted by the following symbols in the
“General prescriptions for use”.
2.1 CONNECTIONS TO THE ELECTRICAL MAINS
NETWORK
The characteristics of the mains power supply to which the equipment
shall be connected are given in the section entitled “Technical data”
on page 19.
The machine can be connected to motorgenerators provided their
voltage is stabilised.
Connect/disconnect the various devices with the machine switched
off.
2.2 FRONT PANEL
1.
Negative pole welding socket.
2.
Connector for gas feed hose:
power source torch
3.
Connector for logic signals of TIG torch.
4.
Positive pole welding socket.
2.3 REAR PANEL
1.
Power cable.
Total length (including internal part): 2,5 m
Number and cross section of wires: 3 x 2,5 mm2
Type of plug supplied: Schuko
2.
Cooler power feeding connector.
Voltage: 230 V a.c.
Current output: 1.0 A
IP protection rating: IP20 (cap open) / IP66 (cap closed)
DANGER!
High voltage!
If the socket is not connected to any devices always close the cap:
presence of hazardous voltage levels!
3.
Connector for gas feed hose:
cylinder power source
4.
Welding power source ON/OFF switch.
1
2
4
3
1
2
3
4

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2.4 PREPARING FOR MMA WELDING
1.
Set the welding power source ON/OFF switch to “O” (unit de-
energized).
2.
Plug the power cable plug into a mains socket outlet.
3.
Choose the electrode based on the type of material and thickness
of the workpiece to be welded.
4.
Insert the electrode in the electrode holder.
5.
Connect the electrode holder cable to the welding socket based on
the polarity requested by the type of electrode used.
6.
Connect the plug of the ground clamp to the welding socket on the
basis of the polarity required.
7.
Connect the earth clamp to the workpiece being processed.
DANGER!
Electric shock hazard!
Read the warnings highlighted by the following symbols in the
“General prescriptions for use”.
8.
Set the welding power source ON/OFF switch to “I” (unit
powered).
9.
Select the following welding mode on the user interface: MMA
10.
Set the required welding parameter values on the user interface.
When the remote controller [RC] is connected and the relative
locking screw is tightened, welding current can be adjusted using
the remote controller.
The system is ready to start welding.

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(polarity to basic electrode)

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2.5 PREPARING FOR TIG WELDING
NOTE: For the cooler to power source assembly procedure refer
to the cooler instruction manual.
1.
Set the welding power source ON/OFF switch to “O” (unit de-
energized).
2.
Plug the power cable plug into a mains socket outlet.
3.
Connect the gas hose from the welding gas cylinder to the rear
gas socket.
4.
Open the cylinder gas valve.
5.
Choose the electrode based on the type of material and
thickness of the workpiece to be welded.
6.
Insert the electrode in the TIG torch.
7.
Connect the torch plug to the welding socket on the basis of the
polarity required by the type of electrode in question.
8.
Connect the plug of the ground clamp to the welding socket on
the basis of the polarity required.
9.
Connect the gas hose from the welding torch to the front gas
socket.
10.
Couple the welding torch connector to the TIG torch signals
connector.
11.
Connect the earth clamp to the workpiece being processed.
12.
Set the welding power source ON/OFF switch to “I” (unit
powered).
13.
Select the following welding mode on the user interface: TIG DC /
TIG AC
14.
Press the torch trigger with the torch well clear of any metal parts.
This serves to open the gas solenoid valve without striking the
welding arc.
15.
Use the flow control valve to adjust the flow of gas as required
while the gas is flowing out.
16.
Set the required welding parameter values on the user interface.
When the remote control pedal is connected and the relative
locking screw is tightened the welding current will vary in relation
to the pressure exerted on the pedal.
The system is ready to start welding.

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(polarity for tungsten electrode)

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3COMMISSIONING
3.1 USER INTERFACE
CODE
SYMBOL
DESCRIPTION
L1
This LED illuminates to confirm the presence of power on the output sockets.
L2
This LED illuminates to show an anomaly in the operating conditions.
See § 3.5 ALARMS MANAGEMENT page 12.
L3
When this LED illuminates the following parameter can be set: SLOPE UP
L4
When this LED illuminates the following parameter can be set: WELDING CURRENT
L5
When this LED illuminates the following parameter can be set: SECOND CURRENT B-LEVEL
L6
When this LED illuminates the following parameter can be set: BASE CURRENT
L7
Slow pulsed DC TIG: When this LED illuminates the following parameter can be set: PEAK TIME
L8
Slow pulsed DC TIG: When this LED illuminates the following parameter can be set: BASE TIME
L7+L8
Fast pulsed DC TIG: When this LED illuminates the following parameter can be set: PULSED CURRENT FREQUENCY
L9
When this LED illuminates the following parameter can be set: DOWN SLOPE
L10
When this LED illuminates the following parameter can be set: FINAL CURRENT
L11
When this LED illuminates the following parameter can be set: POST-GAS
L12
AC TIG: When this LED illuminates the following parameter can be set: AC FREQUENCY
L13
AC TIG: When this LED illuminates the following parameter can be set: AC BALANCE
L14
AC TIG: When this LED illuminates the following parameter can be set: ELECTRODE DIAMETER

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CODE
SYMBOL
DESCRIPTION
L15
Illumination shows that the following function has been activated: 2 stroke procedure.
L16
Illumination shows that the following function has been activated: 4 stroke procedure.
L17
Illumination shows that the following function has been activated: 2 stroke procedure + high frequency arc strike (HF).
L18
Illumination shows that the following function has been activated: 4 stroke procedure + high frequency arc strike (HF).
L19
Illumination shows that the following function has been activated: 4 stroke B-level procedure + high frequency arc strike (HF).
L20
This LED illuminates to show that the following welding mode is selected: MMA
L21
This LED illuminates to show that the following welding mode is selected: TIG DC CONTINUOUS
L22
This LED illuminates to show that the following welding mode is selected: SLOW PULSED DC TIG
L23
This LED illuminates to show that the following welding mode is selected: FAST PULSED DC TIG
L24
This LED illuminates to show that the following welding mode is selected: AC TIG
L25
This LED indicates that the current reference setting is imposed by the remote controller.
D1
Data setting: The display shows the value of the selected parameter.
Welding: The display shows the effective amperes value during welding.
S1
Press and release: the button enables the device to receive the welding current control signal from a remote controller.
S2
Press and release: press the button to select the parameter to be set.
S3
This button selects the torch trigger procedure.
See § 4.1 page 13.
S4
This button selects the welding mode.
E1
Data setting: The encoder sets the value of the selected parameter.
Welding: The encoder sets the value of the following parameter: WELDING CURRENT
J1
Remote controller connector.

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3.2 UNIT POWER-UP
Set the welding power source ON/OFF switch to “I” to switch on the unit.
First power-up or power-ups following a RESET procedure
The welding power source sets up for welding with the factory presets.
Subsequent power-ups
The welding power source sets up for welding in the latest stable welding configuration that was active at the time of power-off.
3.3 RESET (LOAD FACTORY SETTINGS)
The reset procedure involves complete restoration of the default values, parameters and memory settings set in the factory.
The reset procedure is useful in the following cases:
-Too many changes made to the welding parameters so user finds it difficult to restore defaults.
-Unidentified software problems that prevent the welding power source from functioning correctly.
Set the welding power source ON/OFF switch to “O” to switch the unit off.
S2
S4
Hold down both buttons simultaneously.
Set the welding power source ON/OFF switch to “I” to switch on the unit.
SIMULTANEOUS ACTIONS
3.4 TORCH LOADING
WARNING!
Make sure the torch in use is correctly sized in relation to the welding current required and for the available and selected cooling type. This
prevents the risk of burns to which the operator is potentially exposed, potential faults, and irreversible damage to the torch and the system.
If a torch is installed or replaced while the unit is running, the circuit of the newly installed must be filled with coolant to avoid the risk of damage
to the torch in the case of high voltage arc strikes without any liquid in the circuit.
3.5 ALARMS MANAGEMENT
This LED illuminates if an incorrect operating condition occurs.
Tab. 1 - Alarm messages
MEANING
EVENT
CHECKS
Overheating alarm
Indicates tripping of the welding power source
thermal protection.
Leave the unit running so that the overheated
components cool as rapidly as possible.
When the unit has cooled, the welding power source
will reset automatically.
All functions
disabled.
Exceptions:
-Cooling fan.
-Cooler (if
switched on).
-Make sure that the power required by the welding process is lower
than the maximum rated power output.
-Check that the operating conditions are in compliance with the
welding power source data plate specifications.
-Check for the presence of adequate air circulation around the
welding power source.

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4WELDING SETTINGS
4.1 TORCH TRIGGER MODES
2 STROKE LIFT-ARC WELDING (2T)
1.
Touch the workpiece with the torch electrode.
2.
Press (1T) and keep the torch trigger pressed.
3.
Slowly lift the torch to strike the arc.
The welding current reaches the preset value, by way of a up slope time, if programmed.
4.
Release (2T) the trigger to start the weld completion procedure.
The current reaches the end current value in the time set in the down slope time parameter.
The arc is extinguished.
Gas delivery continues for the time set in the post gas parameter.
2 STROKE WELDING WITH HIGH FREQUENCY ARC STRIKE (2T HF)
1.
Bring the torch up to the work until the electrode tip is approximately 2 or 3 mm away.
2.
Press (1T) and keep the torch trigger pressed.
The arc strikes without contact with the workpiece and the voltage discharges (HF) cease automatically.
The welding current reaches the preset value, by way of a up slope time, if programmed.
3.
Release (2T) the trigger to start the weld completion procedure.
The current reaches the end current value in the time set in the down slope time parameter.
The arc is extinguished.
Gas delivery continues for the time set in the post gas parameter.
4 STROKE LIFT-ARC WELDING (4T)
1.
Touch the workpiece with the torch electrode.
2.
Press (1T) and release (2T) the torch trigger.
3.
Slowly lift the torch to strike the arc.
The welding current reaches the preset value, by way of a up slope time, if programmed.
4.
Press (3T) the trigger and keep it pressed to start the weld completion procedure.
The current reaches the end current value in the time set in the down slope time parameter.
The arc continues and the current output will be the value set in the end current parameter.
In these conditions the weld pool can be closed (crater filler current).
5.
Release (4T) the trigger to extinguish the arc.
Gas delivery continues for the time set in the post gas parameter.
4 STROKE WELDING WITH HIGH FREQUENCY ARC STRIKE (4T HF)
1.
Bring the torch up to the work until the electrode tip is approximately 2 or 3 mm away.
2.
Press (1T) and release (2T) the torch trigger.
The arc strikes without contact with the workpiece and the voltage discharges (HF) cease automatically.
The welding current reaches the preset value, by way of a up slope time, if programmed.
3.
Press (3T) the trigger and keep it pressed to start the weld completion procedure.
The current reaches the end current value in the time set in the down slope time parameter.
The arc continues and the current output will be the value set in the end current parameter.
In these conditions the weld pool can be closed (crater filler current).
4.
Release (4T) the trigger to extinguish the arc.
Gas delivery continues for the time set in the post gas parameter.
4 STROKE B-LEVEL WELDING WITH HIGH FREQUENCY ARC STRIKE (4T B-L HF)
1.
Bring the torch up to the work until the electrode tip is approximately 2 or 3 mm away.
2.
Press (1T) and release (2T) the torch trigger.
The arc strikes without contact with the workpiece and the voltage discharges (HF) cease automatically.
The welding current reaches the preset value, by way of a up slope time, if programmed.
3.
Press and immediately release the torch trigger to switch to the second welding current.
The trigger must not be pressed for more than 0.3 seconds; otherwise, the weld completion stage will start.
When the trigger is pressed and released immediately, the system returns to the welding current.
4.
Press (3T) the trigger and keep it pressed to start the weld completion procedure.
The current reaches the end current value in the time set in the down slope time parameter.
The arc continues and the current output will be the value set in the end current parameter.
In these conditions the weld pool can be closed (crater filler current).
5.
Release (4T) the trigger to extinguish the arc.
Gas delivery continues for the time set in the post gas parameter.

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2 STROKE TACKING WELDING WITH HIGH FREQUENCY ARC STRIKE (2T SPOT HF)
All our generators TIG HF have been provided with the spot-welding function. After having switched the machine to 2T HF, set the final welding
current to a value close but not equal to the welding current and set the desired spot-welding time on the descent ramp time.
1.
Bring the torch up to the work until the electrode tip is approximately 2 or 3 mm away.
2.
Press (1T) the torch trigger.
The arc strikes without contact with the workpiece and the voltage discharges (HF) cease automatically.
3.
Release (2T) the torch trigger.
The welding current reaches the preset value, by way of a up slope time, if programmed.
The current reaches the end current value in the time set in the down slope time parameter.
The arc is extinguished.
Gas delivery continues for the time set in the post gas parameter.
4.2 SELECTION OF THE WELDING MODE AND TORCH TRIGGER PROCEDURE
Specific torch trigger procedures are available in accordance with the selecting welding mode.
KEY
2T:
2 STROKE LIFT-ARC
2T HF:
2 STROKE WITH HIGH FREQUENCY ARC STRIKE (HF)
4T:
4 STROKE LIFT-ARC
4T HF:
4 STROKE WITH HIGH FREQUENCY ARC STRIKE (HF)
4T B-L HF:
4 STROKE B-LEVEL WITH HIGH FREQUENCY ARC STRIKE (HF)
S4
Use this button to select one of the following welding modes.
S3
Use this button to select one of the following torch trigger procedures.
PROCEDURE
MODE
2T
2T HF
4T
4T HF
4T B-L HF
MMA





TIG DC CONTINUOUS





SLOW PULSED DC TIG





FAST PULSED DC TIG





AC TIG

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4.3 WELDING PARAMETERS
For a better understanding of the parameter functions described in the table, refer to the following diagram.
(I1)
WELDING CURRENT
(I2)
BASE CURRENT
(I3)
FINAL CURRENT
(t1)
UP SLOPE TIME
(t2)
PEAK TIME
(t3)
BASE TIME
(1/t2+t3)
PULSED CURRENT FREQUENCY
(t4)
DOWN SLOPE TIME
(t5)
PRE GAS TIME
(t6)
POST GAS TIME
WELDING CURRENT
Output current value during welding.
PRE-GAS TIME
Time of gas delivery before the arc strike.
This adjustment is required when fixing points must be created or
when welding in hard-to-reach positions that call for the presence of
inert atmospheres before striking the arc.
Consequences of a higher value:
-This parameter allows a shielded environment to be created,
thereby eliminating contaminants at the start of the welding pass.
SLOPE UP
Time during which the current changes from the starting value to the
welding value by means of a slope.
This setting is used to avoid damaging the edges of the joint with
excessively high current values at the moment of arc striking. The
value of the main welding current is increased gradually in order to
control the uniformity of material deposition and weld penetration.
SECOND CURRENT B-LEVEL
With a rapid press and release (less than 0.5 seconds) of the torch
trigger during welding, the output current value switches to the value
set by means of the “B-level second current” parameter.
This function makes it possible to avoid interrupting the welding
process when the geometry of the workpiece changes; alternatively,
the welding current can be reduced to decrease heating of the part if it
becomes too hot during execution of the welding process.
In DC TIG welding, the parameter is useful when welding different
gauge workpieces during the same pass; when moving between
different gauges the output current can be changed simply by
pressing the torch trigger.
BASE CURRENT
Pulsed wave minimum current.
Consequences of a higher value:
-Faster creation of weld pool.
-Increase of heat-affected zone.
PEAK TIME
Time for which the current pulse is at the maximum value.
Consequences of a higher value:
-Greater weld penetration.
-Facility to make deeper cuts.
Consequences of a lower value:
-Reduction of heat-affected zone.
-Difficult to create a weld pool.
PULSED CURRENT FREQUENCY
Consequences of a higher value:
-Slower melt speed.
-Reduction of heat-affected zone.
BASE TIME
Time during which current output is at the base value.
Consequences of a higher value:
-The filler material is spread more evenly.
-Increase of heat-affected zone.
DOWN SLOPE
Time during which the current changes from the welding value to the
end value by means of a slope.
FINAL CURRENT
During electrode welding the parameter makes it possible to obtain a
uniform deposit of filler material from the start to the end of the
welding process, closing the deposition crater with a current such as
to deposit a final droplet of filler material.
By keeping the torch trigger pressed during the 3rd time, the crater
filler current is maintained thereby ensuring optimal crater filling, until
the post gas time is started by releasing the torch trigger (4th time).
POST GAS TIME
Time of post gas delivery when the welding arc is extinguished.
Consequences of a higher value:
-More effective pickling (improved appearance of workpiece at the
end of the welding pass).
-Higher gas consumption.
Consequences of a lower value:
-Lower gas consumption.
-Oxidation of electrode tip (more difficult arc strike).
AC FREQUENCY
The picture below shows the example where the wave on the second
graph has a double frequency compared with the first.

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Consequences of a higher value:
Arc concentration.
Reduction of heat-affected zone.
Slower melt speed.
AC BALANCE
This parameter establishes the positive wave vs. negative wave time
ratio.
The following figure shows two graphs with different balance value:
the first graph represents the curve of the current with a negative
value balance (more penetration) in which it can be seen that there is
a low percentage of positive wave compared with the negative.
In the second graph the current curve is shown with a positive value
balance (more cleaning); in this case the percentage of the positive
wave is greater than the negative one.
Consequences of a higher value:
Greater weld penetration.
Less cleanliness.
ELECTRODE DIAMETER
The parameter optimizes the AC TIG welding arc strike on the basis
of the diameter of the chosen electrode.

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4.4 PARAMETERS ACTIVATION
The welding parameters are available in accordance with the selected welding mode and procedure.
The table shows the settings required to enable each parameter.
MENU
MODE 

PROCEDURE 
PARAMETER 
1°
WELDING CURRENT











1°
SECOND CURRENT B-LEVEL


1°
BASE CURRENT





1°
PEAK TIME





1°
BASE TIME





1°
PULSED CURRENT FREQUENCY
1°
DOWN SLOPE










1°
FINAL CURRENT










1°
POST GAS TIME










1°
SLOPE UP










1°
AC FREQUENCY
1°
AC BALANCE
1°
ELECTRODE DIAMETER
2°
PRE-GAS TIME






MENU
MODE 

PROCEDURE 
PARAMETER 
1°
WELDING CURRENT










1°
SECOND CURRENT B-LEVEL


1°
BASE CURRENT





1°
PEAK TIME
1°
BASE TIME
1°
PULSED CURRENT FREQUENCY





1°
DOWN SLOPE










1°
FINAL CURRENT










1°
POST GAS TIME










1°
SLOPE UP










1°
AC FREQUENCY





1°
AC BALANCE





1°
ELECTRODE DIAMETER





2°
PRE-GAS TIME







Cod.006.0001.1340
20/02/2014 v2.11
ENGLISH
Discovery 200AC/DC
18/24
4.5 PARAMETERS SETTING: (1ST LEVEL)
S2
Press this button to scroll the list of settings to edit.
The value relative to the selected setting appears on the following displays: D1
E1
Using the encoder, edit the value of the selected setting.
The value is saved automatically.
Tab. 2 - MMA mode
PARAMETER
MIN
DEFAULT
MAX
WELDING CURRENT
7 A
80 A
150 A
Tab. 3 - CONTINUOUS DC TIG mode
PARAMETER
MIN
DEFAULT
MAX
WELDING CURRENT
7 A
80 A
200 A
SECOND CURRENT B-LEVEL
10 %
50 %
200 %
*1
DOWN SLOPE
0.0 s
0.0 s
25.0 s
FINAL CURRENT
5 A
5 A
80 A
POST GAS TIME
0.0 s
10.0 s
25.0 s
SLOPE UP
0.0 s
0.0 s
25.0 s
Tab. 4 - SLOW PULSED DC TIG mode
PARAMETER
MIN
DEFAULT
MAX
WELDING CURRENT
7 A
80 A
200 A
SECOND CURRENT B-LEVEL
10 %
50 %
200 %
*1
BASE CURRENT
10 %
40 %
90 %
*1
PEAK TIME
0.1 s
0.1 s
5.0 s
BASE TIME
0.1 s
0.1 s
5.0 s
DOWN SLOPE
0.0 s
0.0 s
25.0 s
FINAL CURRENT
5 A
5 A
80 A
POST GAS TIME
0.0 s
10.0 s
25.0 s
SLOPE UP
0.0 s
0.0 s
25.0 s
Tab. 5 - FAST PULSED DC TIG mode
PARAMETER
MIN
DEFAULT
MAX
WELDING CURRENT
7 A
80 A
200 A
SECOND CURRENT B-LEVEL
10 %
50 %
200 %
*1
BASE CURRENT
10 %
40 %
90 %
*1
PULSED CURRENT FREQUENCY
5 Hz
100 Hz
250 Hz
DOWN SLOPE
0.0 s
0.0 s
25.0 s
FINAL CURRENT
5 A
5 A
80 A
POST GAS TIME
0.0 s
10.0 s
25.0 s
SLOPE UP
0.0 s
0.0 s
25.0 s
Tab. 6 - AC TIG mode
PARAMETER
MIN
DEFAULT
MAX
WELDING CURRENT
7 A
80 A
200 A
SECOND CURRENT B-LEVEL
10 %
50 %
200 %
*1
DOWN SLOPE
0.0 s
0.0 s
25.0 s
FINAL CURRENT
5 A
5 A
80 A
POST GAS TIME
0.0 s
10.0 s
25.0 s
AC FREQUENCY
20 Hz
64 Hz
208 Hz
AC BALANCE
- 11
0
15
ELECTRODE DIAMETER
1,0 mm
2,4 mm
3,2 mm
SLOPE UP
0.0 s
0.0 s
25.0 s
*1:
This parameter is set as a percentage referred to the value of the following parameter: WELDING CURRENT
4.6 PARAMETERS SETTING: (2ND LEVEL)
S2
Hold down the button for 3 seconds to gain access to the 2nd level menu.
P 0.0
The message appears on the following displays: D1
E1
Using the encoder, edit the value of the selected setting.
The value is saved automatically.
Tab. 7 - CONTINUOUS DC TIG, SLOW PULSED DC TIG, FAST PULSED DC TIG, AC TIG mode
PARAMETER
MIN
DEFAULT
MAX
PRE-GAS TIME
0.0 s
0.0 s
9.9 s

Discovery 200AC/DC
Cod.006.0001.1340
20/02/2014 v2.11
ENGLISH
19/24
5TECHNICAL DATA
Directives applied
Waste electrical and electronic equipment (WEEE)
Electromagnetic compatibility (EMC)
Low voltage (LVD)
Restriction of the use of certain hazardous substances (RoHS)
Construction standards
EN 60974-1; EN 60974-3; EN 60974-10 Class A
Conformity markings
Equipment compliant with European directives in force
Equipment suitable in an environment with increased hazard of electric shock
Equipment compliant with directive WEEE
Equipment compliant with directive RoHS
Supply voltage
1 x 230 Va.c. ± 15 % / 50-60 Hz
Mains protection
16 A Delayed
Zmax
This equipment complies with IEC 61000-3-12 provided that the maximum permissible system
impedance is less than or equal to 30 mΩ at the interface point between the user's supply and
the public system.
It is the responsibility of the installer or user of the equipment to ensure, by consultation with
the distribution network operator if necessary, that the equipment is connected only to a
supply with maximum permissible system impedance less than or equal to 30 mΩ.
Dimensions ( L x D x H )
230 x 460 x 325 mm
Weight
16.0 kg
Insulation class
H
Protection rating
IP23S
Cooling
AF: Air-over cooling (fan assisted)
Maximum gas pressure
0,5 MPa (5 bar)
Static characteristic
MMA
Drooping characteristic
TIG
Drooping characteristic
Current and voltage adjustment range
MMA
7 A / 20.3 V - 150 A - 26.0 V
TIG
7 A / 10.3 V - 200 A - 18.0 V
Welding current / Working voltage
MMA
40 % (40° C)
150 A - 26.0 V
60 % (40° C)
130 A - 25.2 V
100 % (40° C)
120 A - 24.8 V
TIG
30 % (40° C)
200 A - 18.0 V
60 % (40° C)
150 A - 16.0 V
100 % (40° C)
130 A - 15.2 V
Maximum input power
MMA
40 % (40° C)
6.1 kVA
60 % (40° C)
5.1 kVA
100 % (40° C)
4.6 kVA
TIG
30 % (40° C)
6.3 kVA
60 % (40° C)
4.6 kVA
100 % (40° C)
3.6 kVA
Maximum supply current
MMA
40 % (40° C)
26.5 A
60 % (40° C)
22.2 A
100 % (40° C)
20.0 A
TIG
30 % (40° C)
27.4 A
60 % (40° C)
20.0 A
100 % (40° C)
15.6 A
Maximum effective supply current
MMA
40 % (40° C)
16.7 A
60 % (40° C)
17.2 A
100 % (40° C)
20.0 A
TIG
30 % (40° C)
15.0 A
60 % (40° C)
15.5 A
100 % (40° C)
15.6 A
No-load voltage (U0)
MMA
88 V
Reduced no-load voltage (Ur)
TIG
10 V
Rated HF peak voltage (Up)
13.5 kV
Arc striking device designed to work with manual guided torch.

Cod.006.0001.1340
20/02/2014 v2.11
ENGLISH
Discovery 200AC/DC
20/24
6SPARE PARTS